Exhaust Valve errosion

[pfrederi 18,325]

The K341 winter project must have had a long term exhaust valve seating issue.   She is off to machine shop tomorrow to get measured then i will order the parts. (including new valves)

 

 

[ri702bill 8,966]

Hmmm.. a mite nasty, but it may be salvageable - if it is not bent. Chuck it in a lathe or even a cordless drill..... it may surprize you..

[WHX?? 50,703]

16 minutes ago, ri702bill said:

Hmmm.. a mite nasty, but it may be salvageable - 

Not for 22 clams & free shipping on fleabay Bill. That's for both valves too! 

[pfrederi 18,325]

 

With  100+ for machine shop work plus all the parts this is not the point to go cheap...

[WHX?? 50,703]

42 minutes ago, pfrederi said:

 

With  100+ for machine shop work plus all the parts this is not the point to go cheap...

Agreed Paul... I saw valve sets on upward of 50 but for a shelf motor that I may never even put on a tractor? 

I would give it to a bro for the 100 in parts I have into it. The satisfaction I had building it... priceless. 

Edited January 10, 2024 by WHX??

[ri702bill 8,966]

18 hours ago, ri702bill said:

Hmmm.. a mite nasty, but it may be salvageable - if it is not bent. Chuck it in a lathe or even a cordless drill..... it may surprize you..

 

My point is that there are some folks - who are shameless and shall go nameless - that would never consider anything but a genuine Kohler part.......not to start a "tinklefest" here, just an observation...

EDIT - this comment is in no way directed to @pfrederi - Looks like my purpose of posting could be ambigious... that is $0.03!!

Edited January 10, 2024 by ri702bill
Clarification

[squonk 42,518]

Neck is stretched. Not usable 

[WHX?? 50,703]

1 hour ago, squonk said:

Neck is stretched. Not usable 

I thought that  looked funky too and never saw it before. How does that happen? 

1 hour ago, ri702bill said:

would never consider anything but a genuine Kohler part

I would love to use Kohler parts... if I could afford them but when you have thirty tractors to feed... 

[ri702bill 8,966]

6 minutes ago, WHX?? said:

I thought that  looked funky too and never saw it before. How does that happen? 

I would love to use Kohler parts... if I could afford them but when you have thirty tractors to feed... 

Agreed. I try to use OE replacement parts - IF they are still available and  I refuse to endure price gouging. Aftermarket internal parts - yes, I have used them too. ALWAYS buy from a reputable vendor - some of the "cost effective" available items on the internet are questionable......

[squonk 42,518]

33 minutes ago, WHX?? said:

I thought that  looked funky too and never saw it before. How does that happen? 

 

HEAT!!! Too much of it. Then when the valve stops sealing well it runs even hotter.

[ri702bill 8,966]

3 hours ago, squonk said:

Then when the valve stops sealing well it runs even hotter.

My observation exactly if the valve is bent - it cannot close on the full sealing face to transfer heat to to seat.....

[Wayne0 925]

23 hours ago, WHX?? said:

Not for 22 clams & free shipping on fleabay Bill. That's for both valves too! 

Good deal!

Edited January 10, 2024 by Wayne0

[WHX?? 50,703]

9 hours ago, squonk said:

HEAT!!! Too much of it. Then when the valve stops sealing well it runs even hotter.

From running too rich Mike? Plugged fins? Combo of both? 

[squonk 42,518]

1 hour ago, WHX?? said:

From running too rich Mike? Plugged fins? Combo of both? 

Too lean, timing off, dirty fins (restricted air flow.)

[WHX?? 50,703]

20 minutes ago, squonk said:

Too lean, timing off, dirty fins (restricted air flow.)

Yes too lean my bad ... would points being off .020 +- cause it? 

[squonk 42,518]

.020" is ok. But if you start getting into  another.002 or more your starting to get into no mans land. Also depends on gas quality.

[ranger 1,774]

On 1/9/2024 at 8:35 PM, pfrederi said:

The K341 winter project must have had a long term exhaust valve seating issue.   She is off to machine shop tomorrow to get measured then i will order the parts. (including new valves)

 

 

This reminded me of my old boss’s wife’s car, (Renault 5). He brought in an exhaust valve, badly burned, asking where locally he could get it refaced, (on the cheap). At the time I was in charge of our workshop. I sat down in front of the bench grinder, valve in the chuck of a reversible drill, and offered it up to the grind stone. My colleague shone a light from above, and I ‘re-faced’ the valve whilst he gauged the correct angle by looking down at the contact point. We lightly lapped it to it’s seat in the head a couple of times, to ensure angles were okay. All in all it only took a few minutes to ‘reclaim’ the valve, and the whole job was surprisingly easy to achieve a ‘more than acceptable finish’. It would have taken him far longer to travel across town to have the job done professionally! (+ cost him, did I mention he was a bit of a cheapskate?). I wonder where you are now Peter?